Quote:
Originally Posted by jase
Not sure Paul. Mega data doesn't equate to a mega result, at least this time. I'm sure the data is fantastic but it could have been handled differently. As Mike highlights there is definitely a gradient. Not sure what techniques you use to 'proof' your work but if you take the jpeg you've uploaded into photoshop - Image | Adjustments | Equalize.
With Equalize, photoshop finds the brightest and darkest values in the image and remaps them so that the brightest value represents white and the darkest value represents black. Photoshop then attempts to equalize the brightness. This will emphasise the gradient making it easier to visualise the direction, colour and helps to check the result after gradient removal has been applied. This will also be contributing to the data being clipped in the shadows. Which you'll see in the lower left of frame. Gradient removal will clean that up (you'll see it histogram too). I didn't realise this was a Ha rich area - is it?
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Hmmm, bit blunt there Jase. Not sure what your agenda is here. You rave about a certain imager's images and those look like noise central, have elongated stars everywhere and not well colour balanced, and you don't bang him with a sledge hammer.
Yes there looks to be a gradient and I recognised that. I am currently applying a gradient map and thanks for the tip; I think.
I don't think Robert is trying to say I discovered anything at all. Nor am I even thinking along those lines. However, just for your information I will respond to your queries.
1. The flats are accurate.
2. Darks and biases are being subtracted accurately. Or would you like to check my work yourself?
3. Blue green filter data is fine.
4. No light leaks. Everything is screw fitted from the OTA to the camera.
5. The site is a dark site. 5 street lights in the whole town and the nearest is 600m away. If you look around the rest of my images you might find this is not the norm in my images.
I don't really care if this is important to you or not, but the way you have addressed this seems like you think less of me. Your words seem to imply I don't know what I am doing and that is disrespectful. Tell me what is wrong with the image but also tell me what you think is right.